A series of flashable zip files have been released that will bring Google Now to a large list of supported Ice Cream Sandwich devices. If your device is rooted, running ClockworkMod Recovery and is not already being powered by Jelly Bean, then this is for you. The process is simple – just download a zip (there are online/offline dictation versions) and flash through recovery. Easy, right? Once installed, you’ll be able to access the cards and ask it all of the silly questions you can think of.
To see if you own a supported device, check the list under ARMv7. To download the zips, check the original thread here.